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Enhancement of electrochemical properties of micro/nano electrodes based on TiO2 nanotube arrays

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conference contribution
posted on 2017-01-01, 00:00 authored by D Khudhair, Julie Gaburro, S Shafei, A Barlow, Saeid NahavandiSaeid Nahavandi, Asim BhattiAsim Bhatti
Titanium oxide nanotube (TiO2 nanotube) arrays were produced by anodizing titanium foils in two different electrolytes. The first electrolyte consisted of ethylene glycol containing 0.5 wt% NH4F and 4 vol% of distilled water to produce pure TiO2 nanotube arrays and the second consisted of HF aqueous solution (0.5 wt%) containing 0.5% polyvinylalcohol to produce carbon doped TiO2 nanotube arrays. The fabricated TiO2 nanotube arrays were subsequently annealed in the atmosphere of nitrogen. The morphology and crystal structure of fabricated arrays were characterized by means of scanning electron microscopy and X-ray diffraction. The electrical conductivity and capacitance of TiO2 nanotube arrays were investigated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Water contact angle and biocompatibility of fabricated nanotube arrays were investigated. The results showed that carbon doped TiO2 nanotube arrays annealed in the atmosphere of nitrogen have higher conductivity and capacitance than those of pure arrays annealed in the same atmosphere. Doping with carbon enhances the biocompatibility and wettability of TiO2 nanotube arrays. It has also noted that electrical conductivity and capacitance of TiO2 nanotube arrays were directly proportional to the tube wall thickness.

History

Event

American Nano Society. Conference (2016 : Barcelona, Spain)

Volume

829

Issue

1

Series

American Nano Society Conference

Pagination

1 - 7

Publisher

IOP Publishing

Location

Barcelona, Spain

Place of publication

Bristol, Eng.

Start date

2016-11-09

End date

2016-11-11

ISSN

1742-6588

eISSN

1742-6596

Language

eng

Publication classification

E1 Full written paper - refereed

Copyright notice

2017, The Authors

Title of proceedings

ANNIC 2016 : Proceedings of the Applied Nanotechnology and Nanoscience International Conference